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https://www.readbyqxmd.com/read/28545207/quality-and-reactivity-of-dissolved-organic-matter-in-a-mediterranean-river-across-hydrological-and-spatial-gradients
#1
Elisabet Ejarque, Anna Freixa, Eusebi Vazquez, Alba Guarch, Stefano Amalfitano, Stefano Fazi, Anna M Romaní, Andrea Butturini
Understanding DOM transport and reactivity in rivers is essential to having a complete picture of the global carbon cycle. In this study, we explore the effects of hydrological variability and downstream transport on dissolved organic matter (DOM) dynamics in a Mediterranean river. We sampled the main stem of the river Tordera from the source to the sea, over a range of fifteen hydrological conditions including extreme events (flood and drought). By exploring spatial and temporal gradients of DOM fluorescence properties, river hydrology was found to be a significant predictor of DOM spatial heterogeneity...
May 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28545126/pheromone-sensing-neurons-regulate-peripheral-lipid-metabolism-in-caenorhabditis-elegans
#2
Rosalind Hussey, Jon Stieglitz, Jaleh Mesgarzadeh, Tiffany T Locke, Ying K Zhang, Frank C Schroeder, Supriya Srinivasan
It is now established that the central nervous system plays an important role in regulating whole body metabolism and energy balance. However, the extent to which sensory systems relay environmental information to modulate metabolic events in peripheral tissues has remained poorly understood. In addition, it has been challenging to map the molecular mechanisms underlying discrete sensory modalities with respect to their role in lipid metabolism. In previous work our lab has identified instructive roles for serotonin signaling as a surrogate for food availability, as well as oxygen sensing, in the control of whole body metabolism...
May 18, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28544486/impact-of-hydrogen-bonding-on-the-susceptibility-of-peptides-to-oxidation
#3
Bun Chan, Damian Moran, Christopher J Easton, Leo Radom
The tendency of peptides to be oxidized is intimately connected with their function and even their ability to exist in an oxidative environment. Here we report high-level theoretical studies that show that hydrogen bonding can alter the susceptibility of peptides to oxidation, with complexation to a hydrogen-bond acceptor facilitating oxidation, and vice versa, impacting the feasibility of a diverse range of biological processes. It can even provide an energetically viable mechanistic alternative to direct hydrogen-atom abstraction...
May 23, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28544484/neglected-issues-concerning-teaching-human-adrenal-steroidogenesis-in-popular-biochemistry-textbooks
#4
Zhiyong Han, Mark S Elliott
In the human body, the adrenal steroids collectively regulate a plethora of fundamental functions, including electrolyte and water balance, blood pressure, stress response, intermediary metabolism, inflammation, and immunity. Therefore, adrenal steroidogenesis is an important biochemistry topic for students to learn in order for them to understand health consequences caused by deficiencies of enzymes in the adrenal steroidogenic pathways. However, popular biochemistry textbooks contain insufficient information and may sometimes give students a misimpression about certain aspects of human adrenal steroidogenesis...
May 19, 2017: Biochemistry and Molecular Biology Education
https://www.readbyqxmd.com/read/28544245/ghrelin-receptor-inverse-agonists-as-a-novel-therapeutic-approach-against-obesity-related-metabolic-disease
#5
Kathrin Abegg, Lara Bernasconi, Melanie Hutter, Lynda Whiting, Claudio Pietra, Claudio Giuliano, Thomas A Lutz, Thomas Riediger
AIMS: Ghrelin is implicated in the control of energy balance and glucose homeostasis. The ghrelin receptor exhibits ligand independent constitutive activity, which can be pharmacologically exploited to induce inverse ghrelin actions. Since ghrelin receptor inverse agonists (GHSR-IA) might be effective for the treatment of obesity-related metabolic disease, we tested two novel synthetic compounds GHSR-IA1 and GHSR-IA2. MATERIALS AND METHODS: In functional cell assays, electrophysiogical and immunohistochemical experiments, we demonstrated inverse agonist activity for GHSR-IA1 and GHSR-IA2...
May 24, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28543668/artificial-enzyme-based-logic-operations-to-mimic-intracellular-enzyme-participated-redox-balance-system
#6
Yanyan Huang, Fang Pu, Jinsong Ren, Xiaogang Qu
Owning to the biocatalytic properties of artificial enzymes and the redox characteristic of glutathione, a colorimetric and resettable biological operation was successfully designed to mimic enzyme-participated redox balance in living systems. As one promising candidate of natural enzyme, artificial enzyme possesses many advantages and has been used in numerous fields. Similar to natural enzymes, communications are also present between different artificial enzymes. With the assistance of four artificial enzymes, three simple biological logic gates were fabricated to help us deepen the understanding of communications between artificial enzymes...
May 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28543637/evidence-of-the-immunomodulatory-role-of-dual-pi3k-mtor-inhibitors-in-graft-survival
#7
Valery Vilchez, Lilia Turcios, D Allan Butterfield, Mihail I Mitov, Cristin L Coquillard, Anthony J Brandon, Virgilius Cornea, Roberto Gedaly, Francesc Marti
The PI3K/mTOR signaling cascade is fundamental in T-cell activation and fate decisions. We showed the distinct regulation of PI3K/mTOR in regulatory and effector T-cells and proposed the potential therapeutic benefit of targeting this pathway to control the balance between effector and regulatory T-cell activities. Substantial adverse effects in long-term clinical usage of Rapamycin suggest the use of alternative treatments in restraining effector T-cell function in transplant patients. We hypothesize that dual PI3K/mTOR inhibitors may represent an immunosuppressant alternative...
May 24, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28543369/directing-clinical-care-using-lower-extremity-biomechanics-in-patients-with-ankle-osteoarthritis-and-ankle-arthroplasty
#8
REVIEW
Robin Queen
Ankle osteoarthritis is a debilitating disease with approximately 50,000 new cases per year leading to skeletal deformity, severe and recurrent pain, cartilage breakdown, and gait dysfunction limiting patient mobility and well-being. Although many treatments (total ankle arthroplasty (TAA), ankle fusion (arthrodesis), and ankle distraction arthroplasty) relieve pain, it is not clear that these procedures significantly improve patient mobility. The goal of the research presented here is to summarize what is presently known about lower extremity gait mechanics and outcomes and to quantify the impact of ankle osteoarthritis and TAA have on these measures using an explicitly holistic and mechanistic approach...
May 19, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28542281/gait-asymmetry-ankle-spasticity-and-depression-as-independent-predictors-of-falls-in-ambulatory-stroke-patients
#9
Ta-Sen Wei, Peng-Ta Liu, Liang-Wey Chang, Sen-Yung Liu
BACKGROUND: Falls are the leading cause of injury in stroke patients. However, the cause of a fall is complicated, and several types of risk factors are involved. Therefore, a comprehensive model to predict falls with high sensitivity and specificity is needed. METHODS: This study was a prospective study of 112 inpatients in a rehabilitation ward with follow-up interviews in patients' homes. Evaluations were performed 1 month after stroke and included the following factors: (1) status of cognition, depression, fear of fall and limb spasticity; (2) functional assessments [walking velocity and the Functional Independence Measure (FIM)]; and (3) objective, computerized gait and balance analyses...
2017: PloS One
https://www.readbyqxmd.com/read/28542063/drivers-motivating-community-health-improvement-plan-completion-by-local-public-health-agencies-and-community-partners-in-the-rocky-mountain-region-and-western-plains
#10
Anne Hill, Holly J Wolf, Elaine Scallan, Jenny Case, Yvonne Kellar-Guenther
CONTEXT: There are numerous drivers that motivate completion of community health improvement plans (CHIPs). Some are more obvious and include voluntary public health accreditation, state requirements, federal and state funding, and nonprofit hospital requirements through IRS regulations. Less is known about other drivers, including involvement of diverse partners and belief in best practices, that may motivate CHIP completion. OBJECTIVE: This research investigated the drivers that motivated CHIP completion based on experiences of 51 local public health agencies (LPHAs)...
July 2017: Journal of Public Health Management and Practice: JPHMP
https://www.readbyqxmd.com/read/28541477/mitochondrial-retroprocessing-promoted-functional-transfers-of-rpl5-to-the-nucleus-in-grasses
#11
Zhiqiang Wu, Daniel B Sloan, Colin W Brown, Mónica Rosenblueth, Jeffrey D Palmer, Han Chuan Ong
Functional gene transfers from the mitochondrion to the nucleus are ongoing in angiosperms and have occurred repeatedly for all 15 ribosomal protein genes, but it is not clear why some of these genes are transferred more often than others nor what the balance is between DNA- and RNA-mediated transfers. Although direct insertion of mitochondrial DNA into the nucleus occurs frequently in angiosperms, case studies of functional mitochondrial gene transfer have implicated an RNA-mediated mechanism that eliminates introns and RNA editing sites, which would otherwise impede proper expression of mitochondrial genes in the nucleus...
May 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28541374/motor-function-and-incident-dementia-a-systematic-review-and-meta-analysis
#12
Jacqueline Kathleen Kueper, Mark Speechley, Navena Rebecca Lingum, Manuel Montero-Odasso
Background: cognitive and mobility decline are interrelated processes, whereby mobility decline coincides or precedes the onset of cognitive decline. Objective: to assess whether there is an association between performance on motor function tests and incident dementia. Methods: electronic database, grey literature and hand searching identified studies testing for associations between baseline motor function and incident dementia in older adults...
May 25, 2017: Age and Ageing
https://www.readbyqxmd.com/read/28540602/late-conversion-from-tacrolimus-to-a-belatacept-based-immuno-suppression-regime-in-kidney-transplant-recipients-improves-renal-function-acid-base-derangement-and-mineral-bone-metabolism
#13
Kevin Schulte, Clara Vollmer, Vera Klasen, Jan Hinrich Bräsen, Jodok Püchel, Christoph Borzikowsky, Ulrich Kunzendorf, Thorsten Feldkamp
BACKGROUND: Calcineurin inhibitor (CNI)-induced nephrotoxicity and chronic graft dysfunction with deteriorating glomerular filtration rate (GFR) are common problems of kidney transplant recipients. The aim of this study was to analyze the role of belatacept as a rescue therapy in these patients. METHODS: In this retrospective, observational study we investigated 20 patients (10 females, 10 males) who were switched from a CNI (tacrolimus) to a belatacept-based immunosuppression because of CNI intolerance or marginal transplant function...
May 24, 2017: Journal of Nephrology
https://www.readbyqxmd.com/read/28539696/risk-factors-associated-with-falls-in-older-adults-with-dementia-a-systematic-review
#14
Eresha Fernando, Michelle Fraser, Jane Hendriksen, Corey H Kim, Susan W Muir-Hunter
Purpose: People with dementia fall more often than cognitively healthy older adults, but their risk factors are not well understood. A review is needed to determine a fall risk profile for this population. The objective was to critically evaluate the literature and identify the factors associated with fall risk in older adults with dementia. Methods: Articles published between January 1988 and October 2014 in EMBASE, PubMed, PsycINFO, and CINAHL were searched. Inclusion criteria were participants aged 55 years or older with dementia or cognitive impairment, prospective cohort design, detailed fall definition, falls as the primary outcome, and multi-variable regression analysis...
2017: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/28539694/a-retrospective-analysis-of-post-stroke-berg-balance-scale-scores-how-should-normal-and-at-risk-scores-be-interpreted
#15
Kara K Patterson, Elizabeth Inness, William E McIlroy, Avril Mansfield
Purpose: The Berg Balance Scale (BBS) is a performance-based measure of standing balance commonly used by clinicians working with individuals post-stroke. Performance on the BBS can be influenced by compensatory strategies, but measures derived from two force plates can isolate compensatory strategies and thus better indicate balance impairment. This study examined BBS scores that reflect "normal" and disordered balance with respect to dual force-plate measures of standing balance in individuals post-stroke...
2017: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/28539050/functional-capacities-of-polish-adults-of-60-87-years-and-risk-of-losing-functional-independence
#16
Zofia Ignasiak, Teresa Sławinska, Anna Skrzek, Krystyna Rożek, Sławomir Kozieł, Pawel Posłuszny, Robert M Malina
AIM: To characterise the functional capacities of Polish men and women aged 60-87 years and evaluate their status relative to criteria for functional independence. SUBJECTS AND METHODS: Four hundred and thirty-one women and 125 men, aged 60-87 years, who were residents of Wrocław, southwestern Poland, were recruited. Height and weight were measured and BMI was calculated. The Fullerton Functional Fitness Test was administered to test upper and lower body strength, upper and lower body flexibility, agility-dynamic balance and aerobic endurance...
May 24, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28538323/the-effect-of-a-psychomotor-education-program-on-the-static-balance-of-children-with-intellectual-disability
#17
Eleni G Fotiadou, Konstantina H Neofotistou, Paraskevi F Giagazoglou, Vasilios K Tsimaras
Fotiadou, EG, Neofotistou, KH, Giagazoglou, PF, and Tsimaras, VK. The effect of a psychomotor education program on the static balance of children with intellectual disability. J Strength Cond Res 31(6): 1702-1708, 2017-Children with intellectual disability (ID) demonstrate lower balance ability which results in substantial delays in motor growth and limits their function level. Psychomotor education comprises a holistic movement approach, with the aim to improve all aspects of each child personality. The aim of this study was to assess the effect of a psychomotor education program on static balance of school-aged children with ID...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538314/do-neuromuscular-dentistry-designed-mouthguards-enhance-dynamic-movement-ability-in-competitive-athletes
#18
Joshua A Cotter, Steve T Jamison, Sarah A Schloemer, Ajit M W Chaudhari
Cotter, JA, Jamison, ST, Schloemer, SA, and Chaudhari, AMW. Do neuromuscular dentistry-designed mouthguards enhance dynamic movement ability in competitive athletes? J Strength Cond Res 31(6): 1627-1635, 2017-The purpose of this study was to examine the effect of a neuromuscular dentistry-designed mouthguard (NMDD) on dynamic movement ability. Forty-two competitive athletes (8 women, 21.9 ± 2.9 years, 66.8 ± 18.8 kg, 1.68 ± 0.11 m; 34 men, 22.8 ± 4.8 years, 77.4 ± 12.7 kg, 1.78 ± 0.08 m) with greater than 2 years' experience in their designated sport were enrolled in the study...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538303/examining-fundamental-movement-competency-and-closed-chain-upper-extremity-dynamic-balance-in-swimmers
#19
Garrett S Bullock, Nate Brookreson, Amy M Knab, Robert J Butler
Bullock, GS, Brookreson, N, Knab, AM, and Butler, RJ. Examining fundamental movement competency and closed-chain upper-extremity dynamic balance in swimmers. J Strength Cond Res 31(6): 1544-1551, 2017-Abnormal fundamental movement patterns and upper-quarter dynamic balance are proposed mechanisms affecting athletic performance and injury risk. There are few studies investigating functional movement and closed-chain upper-extremity dynamic stability in swimmers. The purpose of this study was to determine differences in fundamental movement competency and closed-chain upper-extremity dynamic balance, using the Functional Movement Screen (FMS) and Upper-Quarter Y Balance Test (YBT-UQ), of high school (HS; n = 70) and collegiate (COL; n = 70) swimmers...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28537430/multifaceted-roles-of-glutathione-and-glutathione-based-systems-in-carcinogenesis-and-anticancer-drug-resistance
#20
Elie Hatem, Nadine El Banna, Meng-Er Huang
SIGNIFICANCE: Glutathione is the most abundant antioxidant molecule in living organisms and has multiple functions. Intracellular glutathione homeostasis, through its synthesis, consumption, and degradation is an intricately balanced process. Glutathione levels are often high in tumor cells prior to treatment and there is a strong correlation between elevated levels of intracellular glutathione/sustained glutathione-mediated redox activity and resistance to pro-oxidant anticancer therapy...
May 24, 2017: Antioxidants & Redox Signaling
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